Feed and speed changing device for machine-tools.



No'. 763,770. PATENTED JUNE 28, 1904. R. K. LE BLOND & W. F; GROENE. FEED AND SPEED CHANGING DEVICE FUR MACHINE TOOLS.

APPLIOA TION FILED APR. 2 1904.

N0 MODEL.

uwmmRs WITNESSES:

ATTORNEY ferent diameters and, in eflect, constituting a. .cone of gears are driven from a driving-gear UNITED STATES FEED AND SPEED CHANGING Patented June 28,1904.

PATENT OFFICE.

oEvlcE FOR MACHINE-TOOLS- SPECIFICATION forming part of Letters Patent No. 763,770, dated June 28, 1904.

Application filed April 2, 1904.

United States, residing at Cincinnati, in the county of Hamilton and Stateof Ohio, have invented certain new and useful'lmprovements in Feed andvSpeed Changing Devices for Machine-Tools, of which the following is a specification.

The invention to be hereinafter described relates to feed and speed changing devices for machine-tools wherein a series; of gears of difthrough an intermediate gear, and has for its general object to provide a device of simple construction capable of ready manipulation to 1 effect the changes desired and wherein the intermediate or transmitting gear shall have .great ease of movement in changing its posi- 'tion to effect the desired speed. I

With the abovesgeneralobje'cts in view the inventionconsists of, mechanical parts and combinations to be hereinafter more fully explained, and definitely pointed out' in the claims,

Inthe drawings, whichshow one embodiment of the'in'vention, Figure 1 is a crosssection onthe line 1' 1 of Fig. 3. Fig. 2 is a front elevation ofthe device, and Fig. 3 is a section on line-33 of Fig. 1: Y

. Mounted in suitable bearings 6} b in'the frame or casing'A-is the shaft B, carrying a series of gears B B ofdiiferent diameters, which, inefl'ect, may constituteacone of gears to which:

motion'i's'to be imparted. In case the shaft B is to be driven from the-cone of gears the latter will of course be properly secured thereto, and in such event said shaft B may constitute the lead-screw of a machine-tool,

' vas shown in. the present embodiment of the invention.

. The elongated gearQ, which constitutes the driving-gear, may receive motion from any.

suitable source, and in theform of the invention shown is mounted lupon a driving-shaft C, which may be operatively engaged with the driving power in any usual manner not necessary to show,- as the same is well understood by those skilled in the art. v

Serial No. 201,257. (Ne model.)

I Disposedabout the elongated driving-gear C is the stationary cylinder D, which for identification may be termed-the bearingcylinder. The bearing-cylinderD is concentric with and surrounds the elongated drivinggear, the ends d d of said bearing-cylinder being preferably formed with journals d d by bolts 03 01 to the casing A.- The details of structure are not essential, as will be under-' stood, but may be varied within wide limits without departing from the spirit of the invention; but the form shown is found to be efiicient and is preferred. The bearing-cylinder D is provided in the part thereof adjacent the cone of gears with a longitudinal pear. 7 I

Rotatably mounted upon the bearing-cylinderDis the bush E, which for identification may be termed the intermediate-gear car: rier. This carrier, while closely fitting about also free. to be moved longitudinally thereof by means of a handle G and locked in position by any suitable means as, for instance, the locking-pin g engaging any one of the *series-of holes 0?, formed in the bearing-cylinder. r m

The intermediate-gear carrier E is provided with an opening or -slot k, on each side of which are the projections or bearings e e, in which ate gear H, which projects through opening .or slot It and, the longitudinal slot (2 of the bearing-cylinder D and is in constant driving connection'with the elongated driving-gear 0'.

about. the bearing-cylinder sufficient to cause or disengaged from-any one of the cone of gearsBB. i

From the construction thus described. and

vention it'will be seen that the driving-gear ative engagement therewith is bodily movable ,circumferentially or about the axis thereofas for the driving-shaft C'and properly secured.

is mounted a shaft 6, carrying an intermedi-.

as constituting one form of the present in- RICHARD K. LE BLOND ANDWWILLIAM F. GROENE, OF CINCINNATI, OHIO.-

slot al for a purpose that will hereinafter apthe bearing-cylinder and rotatable thereon, is

The longitudinal slot (1 is of suflicient'. width to permit the carrier E to be turned the intermediate gear H to be engaged with isbonstituted as an elong'ag'ed gear and that the. intermediate gear while in constant. oper-- well as longitudinally with respect thereto, and by reason of the large bearing-cylinder surrounding the elongated driving-gear that great freedom or movement of the intermediate gear bodily about and longitudinally of the axis of the driving-gear to change the speed of the cone of gears is secured. To change the speed, it is only necessary to withdraw the locking bolt or pin g from engagement with the holes d, swing the intermediate-gear carrier about its bearing upon the bearing-cylinder, and move the carrier longitudinally and with it the intermediate gear H to position opposite the desired gear of the cone of gears, whereupon the intermediategear carrier can be turned to bring the intermediate goar H into engagement with the cone of gears in the new position and the parts locked by the pin 9 entering a hole (1.

If desired, safety devices may be employed to prevent accidental partial engagement of the intermediate gear simultaneously with .two of the gears of the cone of gears; but as this forms no part of the present invention and is well understood in the art it is not necessary to show and describe the same in this connection.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. In afeed and speed changing mechanism for machine-tools, the combination of a series of gears of' varying diameters, an elongated driving gear, a bearing cylinder disposed about the elongated driving-gear, an intermediate-gear carrier movable axially about and longitudinally of the bearing-cylinder, and an intermediate gear mounted on said carrier, and in constant engagement with the elongated driving-gear. g

2. In a feed and speed changing mechanism for machine-tools, the combination of a series of gears of varying diameters, an elongated driving gear, a bearing cylinder disposed about the elongated driving-gear, an intermediate-gear carrier movable axially about and longitudinally of the bearing-cylinder and an intermediate gear mounted on said carrier,

and in constant engagement with the elongated driving-gear, and means for locking the intermediate-gear carrier in axial and longitudinal adjusted position.

3. In a feed and speed changing mechanism for machine-tools, the combination of a series of gears of varying diameters, an elongated driving-gear, a bearing-cylinder surrounding said gear, an intermediate-gear carrier movable about and longitudinally of said drivinggear, an intermediate gear mounted on said carrier and in constant engagement with the elongated driving-gear and means for moving the said carrier and intermediate gear in the manner described.

4. In a feed and speed changing mechanism for machine-tools, the combination of a series of driven gears, an elongated driving-gear, a stationary bearing-cylinder provided with a longitudinal slot and surrounding said elongated drivinggear,an intermediate-gear carrier, an intermediate gear mounted thereon and extending through the slot of the bearingcylinder and in engagement with the drivinggear, and means for moving said carrier and intermediate gear axially about and longitur dinally of the elongated driving-gear.

5. In a feed and speed changing mechanism for machine-tools, the combination of a driven shaft, a cone of gears thereon, a driving-shaft, an elongated driving-gear secured thereto, a slotted bearing cylinder surrounding said elongated driving-gear, an intermediate-gear carrier movable axially about and longitudinally of said cylinder, an intermediate gear mounted on said carrier and extending through the slot of the said bearing-cylinder and in constant engagement with the elongated driving-gear, and means for locking the carrier and intermediate gear in adjusted position.

In testimony whereof we aflix our signatures in presence of two witnesses.

RICHD. K. LE BLOND. WILLIAM F. GROENE. Witnesses:

Gno. T. PRITOHARD, CLARENCE E1011. 

